Follow @Openwall on Twitter for new release announcements and other news
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Thu, 21 Jun 2018 13:54:16 +0200
From: Sven Schwedas <sven.schwedas@....at>
To: oss-security@...ts.openwall.com
Subject: Re: Intel hyper-threading security issues

On 2018-06-21 12:28, Lukas Odzioba wrote:
> 2018-06-21 12:22 GMT+02:00 Lukas Odzioba <lukas.odzioba@...il.com>:
>> If you feel like you really need that, on Linux you can dump SRAT ACPI
>> table decompile it, remove APICID entries of "ht processors", compile
>> it back and put into initrd.
>> https://www.kernel.org/doc/Documentation/acpi/initrd_table_override.txt
> 
> Or use cpu hotplug mechanism, which should be way more convenient:
> https://www.kernel.org/doc/html/v4.17/core-api/cpu_hotplug.html
> 

Hotplug doesn't seem differentiate between HT threads and physical
cores, will setting maxcpus=2 on a 2 cores+HT machine reliably disable
HT, or can it disable one core and keep HT active on the other?



Download attachment "signature.asc" of type "application/pgp-signature" (660 bytes)

Powered by blists - more mailing lists

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.